Horse-power



(No Model.)

M. 0. ROBERTS.

' HORSE POWER.

Patented Jan. 11, 1887.

N. PETERS. HIOIb-Lflhognpinr. Washinglnn. u:c.

UNITED STATES PATENT OFFI E.

MILTON O. ROBERTS, OF GOLLEGEVILLE, PENNSYLVANIA.

HORSE-POWER.

SPECIFICATION forming part (if Letters Patent No. 355,719, dated January11, 1887.

(No modeli) To all whom it may concern.-

Be it known that I, MILTON O. RoBERTs, of Oollegeville, county ofMontgomery, and State of Pennsylvania, have invented an Improvement inHorse-Power Machines, of which the following is a specification. Y

My invention has'reference to horsepower machines; and it consists ofcertain improvements, all of which are fully set forth in the followingspecification and shown in the accompanyin g drawings, which form partthereof.

The object of my invention is to keep the speed of the machine undercontrol bymeans of certain governing appliances. The rapidity of motionis commensurate with the power to be obtained and depends largely uponthe resistance offered, and it will clearly be seen that any diminutionof the resistance will produce a great acceleration of speed,which mightgive rise to the anomaly of the machine running away with the horse, orof compelling the horse to overexertion. The object is also to insure auniform speed being imparted to the machine driven by the horse-powermachine. All such difficulties are completely obviated by thisinvention.

By means of a governor placed upon the band-wheel an excessive speedwill be rendered impossible. Pivoted to the spokes ofthe band- Wheel arecurved metal plates, preferably two, though the number is not materialto the principle of the invention. These curved pieces have looselypivoted to them second pieces, of substantially similar shape, which actas levers. On the outer flange of the drive-wheel above the ends of thecurved plates are brackets 'which'hold adjustable weighted levers."

These second levers are joined by adjustable links to the ends of thefirst levers. On the shorter ends of the first-mentioned levers arebrake-shoes. Now, when the speed of the drive-wheel is accelerated, theweigh ted levers will be thrown by the centrifugal force out away fromthe center of the wheel, drawing up the ends of the levers to which theyare attached, thusforcing down the brake-shoes upon a ring. This ringmay loosely surround a fixed cylinder. Attached to this ring isa chain,the other end of which is fastened line as x, and Fig. 3 is a View 'ofthe variable link for connecting the levers of the governing device.

' A is the frame or body of the machine.

B is the endless-chain treadway or apron. O is the cylinder about whichthetreadway or apron passes, andD is its shaft.

sectional elevation "of the same through the E is the band-wheel, to thespokes e of which the curved metalv piece F is riveted by the bolts fthrough the blocks or supports G, which may, if desired, be madeintegral with the spokes of the wheel.

H is the brake-shoe lever, and is loosely pivoted at h to the plate F,and has-the shoe I at its shorter end. This lever H thus forms a lever,with h as its fulcrum. On theinner surface of the flange E of the wheelE is fixed or cast integral with the wheel a bracket,L, to which ispivoted thelever J, having aheel, j, and an adjustable weight, K. Thislever J is attached by the adjustable link M to the lever H, and by thespring N to the curved plate F or wheel. It vwill be observed that asimilar device is also placed on the opposite side of the wheel-hub; butthe invention'is not limited to the number of relative positions ofthese devices, though the arrangement here shown is preferable.

O is a ring loosely surrounding the cylinder P, which is firmly securedto the framework of the machine. 7

Q is a chain or cable attached 0 and also to the lever B.

to this ring The operation of the machine will now be clearly seen.apron B imparts through "the cylinder 0 and shaft D-a similar motion tothe'band-wheel E, and the speed of this wheel will by centrifugal forcetend to throw out the weighted lever The motion of the treadway or v J,which, through the link M, draws up the one end of the lever H andforces down the other end, pressing thebrakeshoe I upon the ring 0, thuscreating a friction and carrying this ring with it, and winding up thelever B by the chain Q. This will necessarily result either in lesseningthe speed of the machine or in totally stopping it. The lever J has anadjustable weight, K, which may be fixed to suit the weight of thehorses or the power they exert.

' an, one having right-hand and the other lefthand threads, and the nutm, into which these are screwed. This link may thus be varied tocompensate for wear on the brakeshoe I, so that the apparatus may bekept in order and adjusted to exactitude. The spring N is used simply tokeep the lever J normally out of operation, as without it the brakeshoewould be forced down upon the ring 0; and the heel j is to keep thelever J from becoming drawn in too far by the spring. By placing thelever J near the outer part of the wheel as far as possible from thecenter the centrifugal force is increased, and consequently theefliciency of the governor.

The feature of carrying the weighted levers on or near the flange of theband-wheel, which is of large diameter, is very important, not only forsimplicity of construction, but also in view of the increased travel ofthe weighted governor-levers, which makes them more sensitive, and theprotection the governor receives by being placed within the flange ofthe wheel and sheltered thereby.

I do not limit myself to the mere details of construction here shown, asthey are merely those apparently best suited to the explanation of thedevice, but may clearly be varied in many ways without departing fromthe invention.

Having now described my invention, what I claim as new, and desire tosecure by Letters- Patent, is-

1. In a horse-power machine, an endless tramway and power-shaft driventhereby, in combination with a band-wheel secured thereon, a weightedgovernor-lever pivoted on or near the flange of the band-wheel, acy1indrieal brake-surface, a brake-lever carried by the band-wheel andpressing upon said brakesurface, and a positive connection between thebrake-lever and governor-lever, substantially as and for the purposespecified.

2. In a horse-power machine, an endless tramway and power-shaft driventhereby, in

, combination with a band-wheel secured theretially as and for thepurpose specified.

3. In a horse-power machine, an endless The link M is made of twoscrews, m-

tramway and power-shaft driven thereby, in combination with a band-wheelsecured thereon, a governor-lever pivoted on or near the flange of theband-wheel and provided with an adjustable weight, a cylindricalbrake-surface, a brake-lever carried by the band-wheel and pressing uponsaid brake-surface, and a connection between the brake-lever andgovernor-lever, substantially as and for the purpose specified.

4. In a horse-power machine, an endless tramway and power-shaft driventhereby, in combination with a band-wheel secured thereon, a weightedgovernor-lever pivoted on or near the flange of the band-wheel, a loosecylindrical brake-surface, a brake-lever carried by the band-wheel andpressing upon said brake-surface, and a connection between thebrake-lever and governor-lever, a fixed support for the loosebrake-surface, and aweighted lever connection acting upon said loosebrakesurface to hold it in opposition to the action of the brake-lever,substantially as andfor the purpose specified.

5. The combination of the tramway B, frame A, the power-shaft D,band-wheel E secured thereon, lever J, having adjustable weight K andpivoted under the flange of the bandwheel brake-surface 0, brake-leverH, hav- I ing shoe I to press upon the surface 0, spring N, acting onthe lever J, and an adjustable connection, M, between the levers J andH, substantially as and for the purpose specified.

6. The combination of the tramway B, frame A, the power-shaft D,band-wheel. E secured thereon, lever J, having adjustable weight K andpivoted under the flange of the bandwheel brake-surface O, brake-leverH, having shoe I to press upon the surface 0, spring N, acting on thelever J, and an adjustable connection, M, between the levers J and H,the governor comprised in the parts J, O, H, I, N, and M being locatedwithin the flange of the wheel E, substantially as and for the purposespecified.

7. Ina horse-power machine, the combination of the endless tramway, thepower-shaft, a stationary cylindrical brake-surface concentric with saidshaft, a band-wheel secured to said power-shaft of greater diameter thanthe brakesurface and having its flange arranged over said brake-surface,a pivoted brake-lever having a shoe to press on said surface, a pivotedweighted lever, and a connection between said levers, the said leverbeing secured to and carried by the bandwheel and located in the annularspace between the brake-surface and flange of the band-wheel,substantially as and for the purpose specified.

8. In a horse-power machine, the combination of the endless tramway, thepower-shaft, a stationary cylindrical brake-surface concentric with saidshaft, a'band-wheel secured to said power-shaft of greater diameter thanthe brake-surface and having its flange a1- ranged over saidbrake-surface, a pivoted brake-lever having'a shoe to press on saidsurface, a pivoted weighted lever, and an ad 5 justable link-connectionbetween said levers,

the said levers and link-connection being secured to and carried by theband-wheel, and

located in the annular space between the brake-surface and flange of theband-wheel,- substantially as and for the purpose specified. 10

In testimony of which invention I hereunto set my hand.

MILTON O. ROBERTS. Witnesses:

F. G. HonsoN,

A. D. FETTEROLF.

